Brush making machine



Feb. 25, 1936. l.. E. JONES BRUSH MAKING MAC-Hime Filed Sept. 26, 1953 6Sheets-Sheet 1 mw (W i.'tarneys Feb. 25, 1936. E JONES 2,031,658

BRUSH MAKING MACHINE K Filed Sept. 2 6, 1933 6 Sheets-Sheet 2 Feb. 25,1936. 1 E. JONES 2,031,658`

,BRUSH MAKING MACHINE Filed Sept. 26, 1953 6 Sheets-Shag?. 3

Inventor ww y 3 da Feb. 25,` 1936. L. E. JoNl-:s 2,031,653

' BRUSH' MAKINQ MACHINE A Filed sept. 26, 1955 6 sheets-shet 4.ittorneyi Feb. 25, 1936. L. E. JONES 2,031,658`

BRUSH MAKING MACHINE` Filed sept. 26, 1933 v e sheets-Sheet 5 Feb. 25,1936. L. E JoNl-:s 2,031,658

BRUSH MAKING MACHINE I Filed Sept. 26, 1955 e sheets-sheet 6 PatentedFeb. 25, 1936 BRUSH MAKING MACHINE Lloyd E. Jones, Pasadena, Calif.,assignor to Food Machinery Corporation, San Jose, Calif., a corporationof Delaware Application September 26, 1933, Serial No. 690,996 4 claims.(ci. soo-s) This invention relates to a brush-making machine.

One of the primary objects of this invention is to provide abrush-making machine which will 5 operate on two brush coressimultaneously, so as to drill the bristle receiving holes in one coreWhile the bristles are being inserted and stapled in a second core whichhas been previously drilled. In the past, it has been the practice tocarry out the drilling and stapling operations successively in separatemachines, one of which is designed for drilling the cores, and the otherfor stapling them so that by providing a machine in which both of theseoperations are simultaneously and automatically effected, a considerablesaving is realized both in time and labor, thereby increasing lthecapacity of the machine while at the same time, decreasing the cost ofproduction. and of equal importance, producing a superior product.

A further object is to provide a feed means for simultaneously advancingthe brush core being drilled and the brush core being stapled throughequal increments, whereby the-holes drilled into the first brush. corewill accurately register with the stapling funnel of the staplingmechanism during the bristle inserting operation.

A further object is to provide a feed means operable for simultaneouslyadvancing the two brush cores through predetermined longitudinal andangular distances during the inactive period of the drilling andstapling operations.

A further object is to provide a single drivin means operative forsimultaneously actuating the brush core drilling and staplingmechanisms.

A further object is to provide a feed means which may be easily andquickly adjusted for increasing or decreasing the feed of the brushcores. f

A further object is tc provide means for disengaging the feed means fromthe automatic driving means therefor, in order to permit the brush corecarriage to be easily and quickly returned to its initial startingposition.

Other objects and advantages of the invention will become apparent asthe nature of the same is more fully understood from the followingdescription and accompanying drawings, wherein is set forth what is nowconsidered to be a preferred embodiment. It should be understood,however, that this particular embodiment of the invention is chosenprincipally for the purpose of exemplication, and that variationstherefrom in details of construction or arrangement of parts mayaccordingly be effected and yet rel looking toward the machine from thebristle stapling side thereof.

Figure 5 illustrates an enlarged fragmental sectional view of thebristle inserting funnel. Figure 6 illustrates an enlarged fragmentalplan view of the lead screw disengaging means.

Figure 7 illustrates a sectional view taken substantially in the planeof line VII-VII of Fig. 6.

Figure 8 illustrates a sectional View. substantially in the plane ofline VIII- VIII of Fig. 6.

Figure 9 illustrates an enlarged fragmental plan view of the mechanismfor intermittently actuating the feed means and also partially showingthe driving means for the drilling spindle reciprocating mechanism;

Figure 10 illustrates an enlarged fragmental sectional view takensubstantially in the plane of line X-X of Fig. 9.

Figure 11 illustrates an enlarged fragmental sectional View` takensubstantially in the plane of line XI-XI of Fig. 3, while Figure 12illustrates a sectional View taken substantially in the lplane of lineXII-)HI of Fig. 11.

The bristle inserting 'and stapling mechanism illustrated in thedrawings may be of any suitable type or construction, as for example, asillustrated and fully described in the patent to William G. Liebig,'No.845,959, dated March 5, 1907.

As previously pointed out, one of the important features of thisinvention resides in combining the drilling and stapling mechanisms intoa single machine and providing such a machine with a single carriage forsupportingtwo brush cores, and also for providing a feed meansautomatically operable for advancing the carriage a predetermineddistance during the inactive period of the drilling and staplingoperations, and for further arranging the feed means for simultaneouslyturning the brush cores through a predetermined arc while the carriageis being advanced. Due to the above combination, vthe series of bristleholes drilled into the brush core while in the ilrst or Y drillingposition in the carriage, will be serially brought into accurateregister with the stapling funnel of the bristle placing member, whenplaced in the second or bristle stapling position in the carriage. Thusany inaccuracies in the feed means will be translated to the brush corebeing drilled, and when this drilled core is placed in the bristleinserting position, the same inaccuracies will bring the holespreviously drilled, into accurate register with bristle stapling funnel.This feature may be more clearly illustrated, as for example, should thelead screw have a slightly greater pitch between the fourth, and thetenth bristle holes, then at thiselocalitythe carriage supporting thebrush cores wouldbe moved during each actuation a distance slightlygreater than for other portions of the` carriage travel. However, asthis slight inaccurate portion of the lead screw also acts when feedingthis same portion of the brush core to the bristle stapling funnel,these holes having the greater spacing, will be accurately presentedthereto. Of course, it is desirable to have the lead screw accurate aswell as other portions of the feed mechanism, but the above exampleillustrates how the bristle holes will be accurately presented to thestapling funnel even though the feed of the carriage should be uneventhroughout its length of travel.

In the preferred embodiment of the invention as illustrated in thedrawings, the invention may include an appropriate frame 20 arranged tooperatively support a pair of parallel bars 2l, which bars form the waysupon which the carriage 22 may slide back and forth. The carriage 22 maybe of any suitable construction for operatively supporting two brushcores 23 and 24. As illustrated, the carriage may include a pair ofspaced cross heads 25 and 26, each provided with a par of bearings 21 bywhich each cross head may be operatively mounted upon the frame ways orbars 2|. A spacer rod 28 may be securely fastened to the cross head 25as at 29 (Fig. 7) and slidably projected through the bearing 30 of thecrosshead 26. The crosshead 26 may be securely locked to the spacer rod28 as by means of suitable collars 3l clamped to the spacer rod at eachside of the bearing 30 by suitable screw means 32. By this arrangementthe crosshead 26 may be moved to or from the crosshead 25 in order toaccommodate brush cores of diiferent lengths.

The carriage 22 may be provided with means for supporting the brushcores 23 and 24, which means may include providing the crosshead 25 witha pair of spaced bearings 33 and 34 for journally supporting the brushcore driving shafts 35 and 36. 'Ihe inner end of the brush core drivingshaft 35 may be provided with a brush core supporting and driving collet31, Iwhile the outer end thereof may be provided with a driven gear 38.Likewise, the inner end of the brush core driving shaft 36 may beprovided with a brush core supporting and driving collet 39, and theouter end thereof with a driven gear 46. The brush core driving shafts35 and 36 may be arranged to resist endwise motion by any suitable formof means not shown. The Acrosshead 26 may be provided with a bearing 4lin alignment with the crosshead bearing 33 and a bearing 42 in alignmentwith the crosshead bearing 34. A shaft 43 may be slidably mounted in thebearing 4l and provided at its inner end with a collet 44 foroperatively supporting the adjacent end of the brush core 23, while atits outer end may be provided with a cotter key 45 operative forpreventing shaft 43 from being propelled through bearing 4I due tolmeans 50 provided on shaft 41 between bearing 42 and the collet 46 foryieldingly retaining the collet in operative engagement with the brushcore 24. v

A lead screw 5| may be operatively journaled in the frame bearings 52and 53 (Fig. 9) and the carriage 22 may be releasably connected theretoby means of a split nut 54, whereby when the carriage reaches the end ofits travel, the nut means 54 may be released from the lead screw so asto permit a rapid return of the carriage to its initial startingposition. As may be observed most clearly from Figs. 1, 2 and 8, thesplit nut means 54 may include half portions 55 and 56, each of whichmay be slidably mounted in the slide way 51 formed upon the inner faceof the crosshead 25 and operatively retained therein by means of a coverplate 58 secured to the crosshead by suitable screw means 59. Means maybe provided for yieldingly retaining the two half portions of the splitnut in operative engagement with the lead screw, which means may includeproviding each portion with a cam pin 60 (Figs. 6 and 8), eachprojecting through a slot 6| formed in the slide way 51 and into theeccentric cam slots 62 formed in the cam plate 63 operatively mountedupon the top surface of the slide way 51, as by means oi the shoulderscrew 64. The cam plate 63 may be provided with a handle 65 for theconvenience of operation, and with a spring 66 operative for yieldinglyretaining the cam plate in its positions, as illustrated in Figs. 6 and8, to yieldingly maintain the split nut in operative engagement with thelead screw. To release the half portions of the split nut fromengagement with the lead screw, the attendant may grasp the handle 65and rotate the cam plate 63 in a clockwise direction as viewed in Fig.6, whereupon due to the eccentricity of the cam slots 62, the pins 66and thereby the halves 55 and 56 of the split n ut, will be moved apartuntil finally the threads of these nut portions will completelydisengage from the threads of the lead screw. While the split nut isretained disengaged from the lead screw, the carriage 22 may be movedback to its initial starting position.

Means may be provided for turning the lead screw a predetermined amountbetween each actuationx of the drilling and bristle stapling mechanisms.A great variety of means may be made use of for this purpose, but asimple and satisfactory means is illustrated in Figs. l, 9 and l0,wherein a crank shaft 61 appropriately journaled in the frame, is drivenby means of a chain 68 and sprocket 69 from the countershaft 1|), by thedriving sprocket 1I. To oneend of the crank shaft 61 is suitably mounteda crank disc 12, to the crank pin of which the lower end of theconnecting rod 13 may be operatively journaled. The upper end of theconnecting rod may be keyed to the wrist pin 14 by any suitable means,as for example, the pin 15. By this arrangement the Wrist pin 14 willoscillate with the actuation of the connecting rod 13. A rocker 16 maybe journaled at one end upon the end of the lead screw 5| (Fig. 9) whilethe bifurcated free ends 11 thereof may be journaled upon the wrist pin14 so as to straddle the connecting rod 13. By this arrangement, as thecrank disc 12 rotates, the connecting rod 13 will cause the bifurcatedend of the rocker to rock back and forth, and in order to utilize thismotion for intermittently turning the lead screw 5|, a pawl and ratchetmeans may be provided. A pawl 18 may be pivoted intermediate the ends ofthe rocker 16 by means of the pivot pin 19, while a suitable ratchetwheel 80 may be securely keyed to the lead screw 5| and positioned to beengaged by the tooth 8| of the pawl. A spring B2 may be provided foryieldingly retaining the pawl in operative engagement with the ratchetwheel.

The lead screw y'turning means may include adjustable means forpredetermining the rotation of the lead screw for each revolution of thecrank shaft 61, which adjustable means may include an eccentric cam 83journaled upon the inner end of the wrist pin 14 in position for the camsurface thereof, to engage the cam surface 84 of the pawl to throw thetooth 8| thereof out of engagement with the ratchet wheel 80, when thelead screw has turned a predetermined amount. The eccentric cam 83 maybe frictionally retained at its adjusted position, by means of a springWasher 85 held in place by means of the cotter pin 86. A handle 01 maybe provided for turning the eccentric cam 89 for changing the releasingpoint of the pawl from the ratchet, and thereby the extent of turningmoment given to the lead screw.

The two brush cores carried by the carriage may be simultaneouslyrotated during the time the carriage is being fed along the frame ways.

The means for simultaneously turning the brush cores may includeproviding the carriage with a driving gear 88 journaled in the forwardend thereof. as clearly illustrated in Figs. 1, 6 and '7. This drivinggear may be slidably mounted upon the lead screw and caused to rotatetherewith, by means of a key 89 operative in the lead screw key wayv90.The driving gear 88 may be of such diameter as to nicely mesh with thebrush shaft driving gears 38 and 40, whereby each time the lead screw isturned, the driving gear 08 will be turned to thereby turn each of thebrush shaft driving gears 38 and 40 an equal amount. The gears 38 and 40as previously described, are securely mounted upon the outer ends oftheir respective shafts 35 and 35, and thereby any rotation of thesegears will correspondingly rotate the shafts, which in turn, will rotatethe brush cores engaged by their respective collets 31 and 39. 'Ihus itmay be observed that by intermittently turning the lead screw, thecarriage will be fed longitudinally a predetermined amount, whilesimultaneously therewith, the two brush cores carried thereby will besimultaneously rotated.

The means for drilling the bristle holes in the rst brush dore, may bemounted on an adjustable bracket 9|, whereby the drilling head 92thereof may be adjusted to accommodate brush cores of differentdiameters, or for other reasons. The drilling head may include a headstock 93 in which the spindle sleeve 94 may be slidably but -notrotatably mounted. A drill supporting and driving spindle 95 may berotatably but not slidably mounted in the sleeve 94, and by thisarrangement, as the sleeve 94 is reciprocated, the spindle 95 will alsobe reciprocated to thrust the drill 96 carried by the lower end thereof,into drilling engagementwith the brush core. Any suitable means may beprovided for driving the drill spindle 94, as for example, a motor 91may be supported upon the upper end of the bracket v9| and arranged todrive through` a. suitable coupling 98 a hollow shaft 99, which' shaftmay be journaled in the bearing block |00. The upper end of the drillspindle 95 may be slidably mounted in the hollow shaft and driventhereby, by a suitable key |0|"carried 'by the hollow shaft, meshingwith a suitable key way |02formed in the spindle. If desired, a drillguide-.96a may be mounted on the frame for the purpose of accuratelyguiding the drill as it starts' its drilling operation in the core. .f-

Means may b e provided for automatically reciprocating the'vdrillspindle sleeve 94, and thereby the drill spindle and drill in timedrelation with the other elements of the machine. The drill reciprocatingmeans may include asis most clearly illustrated in Figs. 11 and 12, aneccentric |03 operatively carried by the eccentric shaft |04 journaledas at |05 in the bracket 9|. A crosshead |06 may be slidably mountedupon the bracket 9| and may be provided with a slide way |01 in whichthe eccentric may operatively project, whereby as the eccentric isrotated, the crosshead will be reciprocated up and down to the extent ofeccentricity of the eccentric. The crosshead |06 may be connected to thedrill spindle sleeve 94 by means of a suitable bracket |08, whereby thesleeve 94 and drill spindle 95 will-be reciprocated by the crosshead.

In order to reciprocate the drill .spindle in timed relation with thecarriage feed and the lbristle stapling means, the eccentric may bedriven from the carriage feed crank'l shaft 61, which in. turn, isdriven from the driving means for the bristle stapling mechanism. Theeccentric drive may be by means of the sprockets |09, ||0, and chainshaft ||2 and bevel gears H3, one of which may be mounted upon the crankshaft 61. The driving ratio of this train of mechanism is such that witheach revolution of the crank shaft 61, the eccentric |03 will be driventhrough a complete revolution, and the eccentric should be so timed asto feed and retract thel drill from the brush core during the time inwhich the connecting rod 13 is returning the pawl 18 to take a new gripupon the ratchet wheel 80, or in other words, the drill should finishits drilling operation during the inactive period of the carriage feedmechanism. K

As may be observed most clearly in Figs. 3 and 5, the bristle staplingmechanism may be provided with a main drive shaft ||4 driven through asuitable clutch means ||5 by a pulley ||6. The countershaft 10previously referred to, may be driven from the main shaft as by means ofthe pair of sprockets ||1, ||8, and the chain ||9, while the severalparts of the brush stapling mechanism may be driven from the main shaftas by means of the bevel gear |20 and spur gear |2|. means is providedfor actuating the drilling, bristle stapling and brush core feedmechanism, whereby these several elements may berdriven in proper timedrelationship. The details of construction of the bristle staplingmachine are fully illustrated and described in the previously referredto patent, and therefore, it is deemed unnecesary to further describethis element.

The clutch ||5 may be controlled by a suitable lever |22 actuated by therod |23 connected to an appropriate foot pedal, not shown.

Thus it will be appreciated a single drive Cai The brush making machineof this invention may be operated as follows: First, a brush core` to bedrilled may be mounted between the collets 31 and 4l that is in the rstposition in the machine, while a. brush core previously drilled may bemoved from the first position to the second or bristle staplingposition. The split nut is released by means of handle 65 and thecarriage slid along its supporting ways until the first hole in thedrilled brush core accurately registers with the stapling funnel |24,(Figs. 3 and 5) whereupon the handle 65 may be released to permit spring66 to return the cani plate 63 to its original position, and therebythrough the means previously described to slide the half portions of thesplit nut into engagement with the lead screw. The clutch [I5 may now beactuated to connect the driving means for the several elements with thesource of power.

While the stapling mechanism is stapling a tuft of bristles in the ilrsthole, the drilling mechanism will be reciprocated to drill the rst holein the new brush core. After the bristle stapling mechanism and thedrill have been returned to their initial positions, the carriage feedmeans will come into play to advance the carriage a predetermineddistance, and at the same time, simultaneously rotate both of the brushcores so as to bring the secondyhole drilled in the brush core, inaccurate register with the stapling funnel of the bristle insertingmechanism, whereupon the stapling and drilling operations may berepeated. This process may be continued until a tuft of bristles hasbeen stapled in each of the drilled holes of the one brush core, whilethe other of the brush cores will be drilled with thev appropriatenumber Vof bristle holes, and these holes will be drilled in suchrelation that when this core is placed in the bristle stapiing position,the holes drilled therein will accurately register with the staplingfunnel as the machine progresses during its continued operation.

The combined machine has made it possible to greatly reduce the time andcost of producing a superior quality of cylindrical brushes.

Having fully described the invention, it is to be understood that it isnot to be limited Lto the details herein set forth, but the invention isof the full scope of the appended claims.

I claim: 1

1. A brush making machine including a frame, a carriage slidably mountedthereon, a pair of brush core supporting means, each rotatably u mountedupon the carriage, a. drilling vmechanism mounted upon the frame andoperable for drilling the bristle receiving holes in one of the twobrush cores, a bristle inserting and stapling mechanism mounted upon theframe and operable for inserting and stapling the bristles in the otherbrush core, a drive means operable for intermittently and simultaneouslyactuating the drilling and bristle stapling mechanisms, and a feed meansactuated by said drive means during the inactive period of saidmechanisms for advancing the carriage and simultaneously rotating thepair of brush core supporting means a predetermined amount for 'eachactuation thereof.

2. In a bru'sh making machine a frame, a led screw journaled therein, `acarriage slidably mounted upon the frame, means. for releasablyconnecting the carriage with the lead screw, a pair of brush coresupporting means rotatably mounted upon the carriage, and gear means foroperatively transmitting the rotation of the lead screw to the pair ofbrush core supporting means.

3. In a brush making machine a frame,/a lead screw journaled therein, acarriage slidably mounted upon the frame and in operative engagementwith the lead screw, arpair of brush core supporting means rotatablymounted in the carriage, and gear means for operatively transmitting therotation of the lead screw to the pair of brush core supporting means.

4. An intermittent carriage feed for a brush making machine, including aframe, a carriage slidably mounted thereon, a lead screw operativelyjournaled in the frame, a nut means for operatively connecting thecarriage to the lead screw, a ratchet wheel carried by said lead screw,a rocker arm journaled upon the lead screw adjacent the ratchet wheel,a. crank disc operatively mounted in the frame and arranged to be drivenby the driving means of the machine, a connecting rod operativelyconnecting the free end of the rocker arm to the crank disc, a pawloperatively carried by the rocker arm, means for resiliently urging thepawl into engagement with the ratchet wheel, and means for controllingthc extent of engagement of the pawl with the ratchet wheel for in turncontrolling the amount of rotation given to the lead screw for eachrotation of the crankvdisc and thereby intermittently advancing thecarriage a predetermined distance.

LLOYD E. JONES.

